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(No Model.) A2 Sheets-Sheet 2.

J. s. an no. R-oBINsoN. PLOW.

STATES;

PATENT OFFICE.

JOHN s aOBrNsON `AND EDsON O. ROBINSON, OF OANANDAIGUA, N. Y.

PLOW.

ISlEClFIGATlON forminggpart of Letters Patent No. 252,139, dated January 10, 1882.

' Application inea January 21,1831. (Nomodei.)

To allavhom` it .may concern:

. ourimprovements as seen from thefurrow side.

Fig.:2 is aside .elevation ofthe landside ofthe same. Fig.'3 isa section through the corrugated beam ontheline ww, Fig. 1.- Fig. is a plan view. Fig. 5 :isa sideelevationof the front part of the landsideof our improved plow, theshim-piece beingremoved.y Fig.6is an inverted view ofthe point. Fig..7'isa section through the pattern from ywhich the `point is cast, on the line y y, Fig. 6.- Fig. SisV an inverted view of the detachableportion ofthe point pattern. Fig. 9 isa seetionon the Vline for( x', Fig..5, showing the parts loelowr that line. Fig. 10 represents the shimfpiecefas seen from'the inside. Figs. 11, 12, and13are.horizoutal'sections through the jointer-standard immediately` above the beam, showing the different positions in which p the join-termay belattached to the loeam. Fig.

1,4 isa section thronghthe forward end of the p jointer-brace on the line z z, Fig. 16. Fig. 15

isahorizontal sectionthrough the j ointer-standard andthefupperportion of the landside, showing the jointer-brace in plan view. l Fig. 16 is a side view of` theforward end of the jointerbrace. Fig. 17is aside view of the jointerbrace. Fig. lSrepresents the outer face of the notchedcollar. Fig.-19 vis asection through the -wheelstandardl `immediately above the beam, `showing the-different positionsinwhich itlmaybeattached to the beam. Fig. 20 isa horizontal'section, showing a modied form of the shim-piece. Fig. 21 is a section `of a portion of thejointer-standard on theline y y', Fig. 17.

Fig. 22 shows the rubber spring employed in the forward end of the jointer-brace.

In the accompanying drawings, `A is the mold-board of a plow embodyingourimprovements; B, thelandside, and() thebeam. F is the mold-board of the jointer, G its point, and J the jointer-brace.

The beam C, which is cast of anysuitable material,is corrugated iongitudinallas shown in the side views, Figs.1 and 2,and in section, Fig. 3, the corrugations extending continuously from end to end of the beam. The beam consists of the upper and lower horizontal anges,a a', Fig. 3, and the corrugated web b, which starts from the inner central `portion of the flanges and bends laterally next each `iiange, in the same direct-ion, as shown at o c,

Fig. 3, and then turning in 4the oppositedirection forms thecentral corrugation, al. `At

each end of thebeam-the dan ges a a are joined together, the forwardend of the beam being provided with notches `for the reception of the clevis and therear end with a lug,.e, by which it is bolted to the rear arm, M, of the plowstandard. AThe corrugations increase the stiffness of the beam in a'material degree,wthout adding to `the weight.V The beam is fastened tothe forward arm, L, of the plow-standard by the bolt d, thetupper end of which is secured in arecess in the plow-beam by a nut. VThis recessie provided witha flange for the purpose of strengthening the beam.

The form and mode of attachment of the shim-piece are shown in Figs. J2, 5, 9, and 10. The shirnQpiece N consists of a plate curved on itsforwa-rd Vor cutting edge to conform to the shape of the plow, and is provided with a projecting flange, y, forming a joint with the forward edge of the mold-board. (See Fig. 9.)

The shim-pieceis preferably made ot' the shape `a recess of `corresponding shape formed to receive it in the standard of the plow, the outside `of the shim-piece coming flush with the standard. The recess in the standard is bev# eledtoadapt it to the beveled edges of the shim-piece. The shim-piece is fastened inthe recess in the standard bya bolt,f, Fig. 9,pass ing through the standard, and provided with a nut on theinside thereof.

Inl Fig. 20 we have shown a modification of IOO the shim-piece, in which it is adapted to be bolted onto the inside of the laudside of the plow.

The mold-board and point of our improved plow are of the usual construction, with the exception that4 the point is provided on its lower side with a diamond-shaped groove,into which a corresponding rib or embossmeut on the forward portion of the standard tits, for the purposeof holding the point in its position and preventing it from shifting iu either direction if the bolt becomes loose. The embossment on the front end of the standard is shown at g, Fig. 9, while the correspondingly shaped groove on the under side of the plow-point is represented at h, Fig. 6. The bolt by which the point is fastened to the standard passes through the center of the embossment.

In casting the plow-point the groove h is formed by a loose piece, O, inserted into the pattern, (shown in Fig.8 and in the sectional view, Fig. 7,) which is removed from the sand after the withdrawal of the pattern. The pattern is drawn from the sand point foremost, in order that the recess in the under side thereof, which receives the forward end of the standard, may be made without employing cores, and consequently, in order to form the groove 7L, a portion of it is made in the loose piece O,

the forward end of thel joiuter-brace is held thereon. The forward end of the brace contains an opening, k, having a notch, I, Fig. 16, adapted to fit over the stud tand the lug j. The brace is applied to the jointerstandard by inserting the stud t' into the opening k, the rear end of the brace being held in the vertical position, so that the lug j passes through the opening Z, after which the brace is locked to the standard by turning its rear end downward and backward and securing it t0 the plow-standard bythe bolt m, Figs. 15 and 17.

Between the studi and the inner end of the brace J is placed a rubber block, u, Figs. 17 and 22, which is held inv place by a flange on the brace projecting partially over the opening, as shown at o, Fig. 14. The rubber block deadens the force of any blow received by the jointerand prevents thebreakage ofthejointerstandard. The rear end of the brace is secured to the standard L by the bolt m, a notched collar, K, being inserted between the two. The inner end of the collar fits into a circular recess in the standard, and the outer end is notched or ribbed to correspond with vthe inner face of the brace, (see Figs. 15 and 18,) so that the position of the brace lengthwise of the plow may be varied.

Our improved plow is so constructed that the position of the beam with reference to the landside may bel changed to suit the employnient of two or three horses, the lug on the rear arm, M, of the plow-standard being made wide enough to admit of shifting the beam from the position. shown in full lines in Fig. 4 to the position indicated by dotted lines.

In order to keep thelaud side of thejointer parallel with the landside of the plow in eitherl position of the beam, we make the inner side of the jointer-standard with two faces slightly inclined toward each other, as shown in Figs. 11, 1,2, 13, and 15. The jointer -standard is provided with two slots, pp', Figs. 2 and 12, so that it may be attached to the plow-beam by the bolt q, with either ofthe inclined faces in contact with the beam. The an gle between the two inclined faces corresponds with the angle through which the beam is shifted ,to change from two to three horses, so that by inserting the bolt in one or the other of the slots p p the jointer can be arranged parallel with the landside in either position of the beam.

To avoid the necessity of changing the position of the jointer lengthwise of the plow,

the beam is provided with two holes (sce Fig.

1) for the bolt q, located at such a distance from each other as to correspond with the slots p p.

Provision is made for shifting the wheel H to correspond with either position of the beam by theinclined notches on the side ofthe-beam. (Shown in Fig. 19.) The arm I, which carries the wheel H, is fastened tothe plow-beam by means of the bolt r, which passes through a slotted hole in the bea-m,so as to permit of the arm being changed from the position shown in t'ull lines in Fig. 19 to the position indicated by the dotted lines. The flanges on the upper and lower sides of the beam are provided with lugs s s', between which are formed notches having surfaces inclined in different'directions at an angle with each other corresponding to the different positions of the beam. The shape of the notches will be readily understood from the drawings, the wheelarm in one position resting on the inclined surfaces t and t and in the other on the surfaces u and u.

Thejointer may be adjustably attached to the beam by means of double inclined notches,l iu a manner substantially similar to that in which the wheel-standard is connected to the beam.

In order to provide for gaging the depth of the furrow,we east on the wheel-standard a series -of numbers, which indicate in inches the vertical distance from the lower side of the wheel tothe horizontal plane in which the lower side of the plow is located. When the wheelstandard is placed so that any one ofthese numbers comes opposite the upper flange of the beam the furrow will correspond in depth in inches with that number, except in case the ground is so soft that the wheel sinks into it, when a suitable allowance for this difference should be made.

Instead o f the rubber spring a, a block of Ioo IOS

IZS

252,1139. Y l s wood or other slightly elastic subst-ance may be employed in the recess in the jointer-brace for the purpose of deadening the force of any blow received by the jointer.

W e are aware that plow-points provided with longitudinal corrugations have been previously applied to standards provided with corresponding corrugations, as shown in the patent of Hall, No. 220,373, October 7, 1879, and such construction we. do not claim.

We are also aware that a recessed standard provided with projections adapted to iit a plowpoint provided with acorresponding projection and recesses has been previously shown in the patent of Bowsher, N o. 205,236, J une 25,1878, and such arrangement of the locking-lugs we hereby disclaim, as by our construction we are enabledto make the standard and point of substantially equal thickness throughout, the

ystandard being stronger than standards of the ordinary form, in consequence of the diamondshaped rib cast on it, and the point in turn possessing the full strength of the plate about the bolt-hole without being materially weakened by the diamond-shaped'groove, While the standard and point together, although firmly secured to each other by the rib and groove, require no more metal than when made with dat surfaces. Our construction also obviat'es loss from breakage from strains in casting 3o caused by unequal thickness of the parts.

We do not claim herein the combination of the wheel-standard and the double inclined notches.

We claiml. Thecombination ofthe double-facedjoint-4 er-standard and the brace J, substantially as described. 4

2. The angular or double-faced and doubleslotted jointer-standard E, in combination with the bolt q, passing through the plow-beam, substantially as described.

3. The combination of the plow-standard. provided with the diamond-shaped rib g, and the point D, having on its under side the correspondingdiamond-shaped groove, h, su bstantially as and for the purposes set forth.

JOHN S. ROBINSON.

EDSON O. ROBINSON.

Witnesses:

H. M. U'rTLEY, M. D. HOPKINS. 

